Internal-combustion engine relating to the carburation of hydrocarbonliquid fuel



March 2,1926. 1,575,333

a. HAMILTON-GRAPES INTERNAL. COMBUSTION ENGINE RELATING: TO THE CARBURATI'G-N' on HYDROGARBON LIQUID FUEL Filed August 20, 1925 PatentedMar. 2, 1926.

NIT D STATES.

v v 1,575,333 PATENT OFFICE,

GEORGE EAiiIL'roN-emrEsfor MELBOURNE, vrc'ronm, Ausrnamh.

I INTERNAL-CQMBUSTIONENGINERELATING TO THE CARBU v Lre rn EUEL.

Application filednugust 20, 1923. Serial No. 658,455.

To all whom it may concern: I

Be it known that I, GEORGE HAMILTON- GRArEs,a subject of the King of Great Brit-" ain, residing at Melbourne, in the State of.

Victoria, Commonwealthv of Australia, have invented certain new and useful Improvements in Internal-CombustionEngines Re: lating to the Carburation of Hydrocarbon- Liquid Fuel, of which the following is a specification-- The present lnvention refers to internalcombustion engines and specifically to the carburation of hydrocarbon liquid to be employed as the fuel agent in theiengine cylinders and in which vaporization of the moist particles resident in the carburetted mixture efi'ected by any usual form of carburetting device is effected in a retort so arranged relative to the mixture stream that said particles are trapped therein and vaporized by the heat from the engine exhaust gases.

An example of such a retort is illustrated in the complete specification of Patent llo. 1,417 1,599 dated October 23, 1923, in whlch the exhaust gases are icy-passed from the engine exhaust manifoldto a jacket sur-.

rounding said retort which arrangement results in the latter being loeatedat an appreciable distance from andbelow themaximum heat position in the exhaust manifold.

According to the present invention the maximum heat position' is secured for the retort by a construction of theengine exhaust manifold so that the retort may be directly fitted therein and also a valve which latter is preferably thermostatically got and the conductor associated. therewith viewed from the deliveryend of the latter..

Fig. 3 is a plan of the end of exhaust manifold whichlis chambered to receive said retortand' i.

Fig.4 is a side elevation, partly in sec-- tion, of the same. u

retort 8.

1ustable by nut 20.

- The engine exhaust manifold 5 is a straight tube and at the engine end cylinder position 6 terminates in an enlargement forming a chamber 7 to receive the retort chamber 8 secured to said chamber 7 by lugs 7 and flange 10*, joined by screws as at 9 said retort being offset from the passage 10 the wall of which latter is integral withthe communicates with the delivery from any ordinary carburetter, and said inlet, passage 1 and retort are constructed'to function in ac gcordance with apphcants beforementioned Letters Patent, To facilitate an pnderstanding of the stream lineof the carburetted mixture and the manner in which same throws out moist particles into the retort chamber 8 the stream line is shown in said passage 10 the line beingapproximately correct having been ascertained from an experimental construction made of glass.

- Directlyopposite the mouth 12 of the retort 8 an annulus 13 is formed in the wall of the passage 10 into which moist particles may collect and feed downwardly into said mouth (see Fig. 1). j

The delivery end of said passage 10 terminn'rron or nxnnocannon- The inlet 1110f the passage 10" nates in a flange 14: which'is used to connect same to the inlet manifold (not shown) of the engine. I H 1 The exhaust gases admitted to chamber 7 pass out through opening 15 in the end of I the exhaustmanifold 5 (see Fig. 4) and, between the said opening 15 and. the exhaust from the end cylinder of the engine, an-

other outlet 16 is provided which outlet is a controlled by valve 17. The'spindle-of said valve 17 extends through the exhaustinanifold (see Fig. 1) andhas attached thereto an arm 18 to which is pivotally attacheda screw threaded rod 19 the position of the ivotal connection of the latter being ad- To prevent anyvibra tion' of the rod 19' a spring21 may be coiled about same be tween the sleeve 22 and stop nut 23; m

The rod 19 is employed to control the valve 17 and this maybe effected thermostatically by a fiat spiral spring 24 of two v metals having diiferent coefiiclents of expansion housed within a chamber 25 on the wall of the manifold chamber 7 (see Fi 3 and 4). The spring 24 is substantia ly wide" and more or less rigid trans-' versely to prevent'buckling under heat inin a slot 30 in an arm 31 loosely hung from pin'26.

The end of the rod 19 is pivotally attached to the outer end of said arm 31.

Under working conditions the whole of the heated exhaust gases pass from 1nanifold 5 through chamber 7 thence away through outlet 15' and when the heat 'so applied to the retort 8 exceeds a predetermined degree the spring-24 operates byunwinding to draw upon the arm 31, rod 19. and arm 18 to open valve 17 and allow some of the exhaust gases to by-pass through opening 16 until such time as the chamber 25 has become cooler when the return movement of the spring 24 will operate to close said valve 17. v r

I claim-- 1. In an internal combustion engine, an exhaust manifold havin an enlarged portion atits discharge end adjacent one of the engine exhaust. ports and having an outlet in said enlarged portion, a conductor for conducting carburetted mixture between a carbureter and an engine m-take manifold, a

retort having a single opening detachably connected to and extending into said enlarged portion, said retort having substantially lateral communication with said conductor, and said conductor having an internal, substantially transverse groove enter ing the mouth of said retort, and a by-pass valve for said manifold.

.2. In an internal combustion engine, an

exhaust manifold having an enlarged end portion adjacent an engine cylinder exhaust and having a discharge opening therein, a by-pass opening 1n sald manlfold ad acent said enlarged portion, a valve thereln, a

chamber on said enlarged portion, a spirally wound bi-metallic thermostatic strip in said chamber, .means to adjust said strip, an adjustable connection between the strip and valve, a retort detachably connected to and entering said enlarged portion, and aconductor with which said'retort laterally communicates, said conductor having aninternal groove entering into the mouth of said retort.

Dated this-11th day of July 1923.

G. HAMILTON-GRAPES. 

